Use of 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid as plant immunity elicitor

Abstract

A 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid in the preparation of a plant immunity elicitor. 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid as a natural active substance is developed into a plant immunity elicitor. The plant immunity elicitor can be used for improving the resistance of plants to a biotic stress and an abiotic stress, effectively preventing fungi, bacteria and viruses from infecting the plants, and further reducing the pathogenicity. Meanwhile, the plant immunity elicitor can significantly improve resistant ability of the plants to high temperature, low temperature, drought and salt stresses. 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid has the characteristics of safety, environmental protection and high efficiency.

1 . A method for preparing a plant immunity elicitor comprising preparing a composition comprising 2-amino-3-indolyl butyric acid and/or 3-methylpyrrolidine-2-carboxylic acid. 
     
     
         2 . A method for improving resistance of a plant to an abiotic stress and/or a biotic stress comprising treating the plant with 2-amino-3-indolyl butyric acid and/or 3-methylpyrrolidine-2-carboxylic acid, wherein the abiotic stress is any one or more selected from high temperature, low temperature, drought and/or salt stresses, the biotic stress is any one or more selected from fungal, bacterial and viral stresses, a fungal disease is wheat powdery mildew, a bacterial disease is a disease caused by  Pseudomonas syringae  and a viral disease is tomato spotted wilt. 
     
     
         3 . The method according to  claim 1 , wherein the plant is selected from a grain crop, an economic crop and a vegetable. 
     
     
         4 . The method according to  claim 3 , wherein the grain crop is wheat, the economic crop is ryegrass, tea leaves and cotton, and the vegetable is tomatoes. 
     
     
         5 . A plant immunity elicitor containing a component A: any one or two of 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid, and a component B: a surfactant. 
     
     
         6 . The plant immunity elicitor according to  claim 5 , wherein the surfactant is Tween 20. 
     
     
         7 . The plant immunity elicitor according to  claim 6 , wherein the concentration of the Tween 20 in the plant immunity elicitor is 0.01-0.05% (v/v), preferably 0.02% (v/v). 
     
     
         8 . The plant immunity elicitor according to  claim 5 , wherein the concentration of 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid in the plant immunity elicitor is 0.1-10,000 nm. 
     
     
         9 . A method for improving resistance of a plant to a biotic and/or an abiotic stress, wherein 0.1-10,000 nm of 2-amino-3-indolyl butyric acid or 3-methylpyrrolidine-2-carboxylic acid is applied to a target plant. 
     
     
         10 . The method according to  claim 9 , wherein the abiotic stress is any one or more selected from high temperature, low temperature, drought and/or salt stresses, the biotic stress is any one or more selected from fungal, bacterial and viral stresses, a fungal disease is wheat powdery mildew, a bacterial disease is a disease caused by  Pseudomonas syringae  and a viral disease is tomato spotted wilt. 
     
     
         11 . The method according to  claim 2 , wherein the plant is selected from the grain crop, the economic crop and the vegetable.